import unittest


class Test01(unittest.TestCase):
    a = None

    def test01(self):
        Test01.a = 100
        # self.a = 1
        # print("test01=====", self.a)
        # print("id1=====", id(self))
        print("a1===", Test01.a)

    def test02(self):
        # print("test02=====", self.a)
        # print("id2=====", id(self))
        print("a2===", Test01.a)
